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Scripting: Start bringing up lists in lua

This commit is contained in:
Vicki Pfau 2022-05-17 21:22:18 -07:00
parent 31a7f09b8a
commit 9c6068a526
1 changed files with 84 additions and 0 deletions
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84
src/script/engines/lua.c
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@ -41,6 +41,8 @@ static int _luaSetObject(lua_State* lua);
static int _luaGcObject(lua_State* lua);
static int _luaGetTable(lua_State* lua);
static int _luaPairsTable(lua_State* lua);
static int _luaGetList(lua_State* lua);
static int _luaLenList(lua_State* lua);
#if LUA_VERSION_NUM < 503
#define lua_pushinteger lua_pushnumber
@ -105,6 +107,13 @@ static const luaL_Reg _mSTTable[] = {
{ NULL, NULL }
};
static const luaL_Reg _mSTList[] = {
{ "__index", _luaGetList },
{ "__len", _luaLenList },
{ "__gc", _luaGcObject },
{ NULL, NULL }
};
struct mScriptEngineContext* _luaCreate(struct mScriptEngine2* engine, struct mScriptContext* context) {
UNUSED(engine);
struct mScriptEngineContextLua* luaContext = calloc(1, sizeof(*luaContext));
@ -139,6 +148,14 @@ struct mScriptEngineContext* _luaCreate(struct mScriptEngine2* engine, struct mS
#endif
lua_pop(luaContext->lua, 1);
luaL_newmetatable(luaContext->lua, "mSTList");
#if LUA_VERSION_NUM < 502
luaL_register(luaContext->lua, NULL, _mSTList);
#else
luaL_setfuncs(luaContext->lua, _mSTList, 0);
#endif
lua_pop(luaContext->lua, 1);
return &luaContext->d;
}
@ -297,6 +314,16 @@ bool _luaWrap(struct mScriptEngineContextLua* luaContext, struct mScriptValue* v
lua_pushstring(luaContext->lua, ((struct mScriptString*) value->value.opaque)->buffer);
mScriptValueDeref(value);
break;
case mSCRIPT_TYPE_LIST:
newValue = lua_newuserdata(luaContext->lua, sizeof(*newValue));
if (needsWeakref) {
*newValue = mSCRIPT_MAKE(WEAKREF, weakref);
} else {
mScriptValueWrap(value, newValue);
mScriptValueDeref(value);
}
luaL_setmetatable(luaContext->lua, "mSTList");
break;
case mSCRIPT_TYPE_TABLE:
newValue = lua_newuserdata(luaContext->lua, sizeof(*newValue));
if (needsWeakref) {
@ -702,3 +729,60 @@ int _luaPairsTable(lua_State* lua) {
lua_pushnil(lua);
return 3;
}
int _luaGetList(lua_State* lua) {
struct mScriptEngineContextLua* luaContext = _luaGetContext(lua);
ssize_t index;
#if LUA_VERSION_NUM >= 503
index = lua_tointeger(luaContext->lua, -1);
#else
index = lua_tonumber(luaContext->lua, -1);
#endif
struct mScriptValue* obj = lua_touserdata(lua, -2);
lua_pop(lua, 2);
obj = mScriptContextAccessWeakref(luaContext->d.context, obj);
if (obj->type == mSCRIPT_TYPE_MS_WRAPPER) {
obj = mScriptValueUnwrap(obj);
}
if (!obj || obj->type != mSCRIPT_TYPE_MS_LIST) {
lua_pushliteral(lua, "Invalid object");
lua_error(lua);
}
struct mScriptList* list = obj->value.opaque;
// Lua indexes from 1
if (index < 1) {
lua_pushliteral(lua, "Invalid index");
lua_error(lua);
}
if ((size_t) index > mScriptListSize(list)) {
return 0;
}
--index;
struct mScriptValue* val = mScriptListGetPointer(list, index);
if (!_luaWrap(luaContext, val)) {
lua_pushliteral(lua, "Invalid value");
lua_error(lua);
}
return 1;
}
static int _luaLenList(lua_State* lua) {
struct mScriptEngineContextLua* luaContext = _luaGetContext(lua);
struct mScriptValue* obj = lua_touserdata(lua, -1);
lua_pop(lua, 1);
obj = mScriptContextAccessWeakref(luaContext->d.context, obj);
if (obj->type == mSCRIPT_TYPE_MS_WRAPPER) {
obj = mScriptValueUnwrap(obj);
}
if (!obj || obj->type != mSCRIPT_TYPE_MS_LIST) {
lua_pushliteral(lua, "Invalid object");
lua_error(lua);
}
struct mScriptList* list = obj->value.opaque;
lua_pushinteger(lua, mScriptListSize(list));
return 1;
}